Office-desk



(No Model.)

G. H. TYLER.

OFFICE DESK. V No. 287,068. Patented Oct. 23, 1883.

N. PETERS, Phnln-Lilhogriphar. wuhinghm D. c.

view of that shown in Fig. 8.

UNITED STATES PAT NT OFFICE.

CHARLES H. TYLER, or sr. LOUIS, MISSOURI.

OFFICE-DESK SPECIFICATION forming part of Letters Patent No. 287,068, dated October Application filed May 3, 1883; (No model.)

the city of St. Louis, in the State of Missouri, have invented a certain new and useful Improvement in Office-Desks, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to the class of officedesks known as cylinder desks, and applies to attachments to the drop cover or cylinder, rendering the movements of the same easy. 7

The invention is'intended more especially as an improvement on the office-desk for which Letters Patent were granted to me bearing date the 7th day of November, 1882; and it consists in springs and guides in connection with the-drop-cover, as set forth.

Figure 1 is a rear view of a desk with part of the back and partitions removed to show my improvement. Fig. 2 is a vertical section of the device at line2 3, Fig. 1, the cover being shown down, and Fig. 3 is a section at line 2 3, with the cover shown elevated or open. Figs. 4 and 5 are detail perspective views of the spring that pushes the cover forward. Fig. 6 is a detail section at 6 6, Fig. 3, looking forward. Fig. 7 is a rear view of the guideplates and guide-bars. detail at line 2 3, (enlarged,) showing the attachment of the spring-belt to the lower sec-' tion of the cover. Fig. 9 is an enlarged detail section at line 2 3, showing the bearing of the upper section of the cover against the spring-cushion at the rear. Fig. 10 is a top My improvement is shown applied to a cover consisting of an under section, 0, and an upper section, 0, the former retreating beneath the latter, and both retreating into the top B when the desk is opened. This construction of cover is described in my patent hereinbefore mentioned. The cover-sections are hinged to the desk at O.

D is a guide-bar attached at front to the front bar, B, of the top, and attached at the rear end to the rear part of the desk by means of the bracket E or otherwise. The bar D has at the under side a rib, d, which enters a notch in the plate G, attached to'the rear edge of the upper cover-section, 0, so as to form a guide Fig. 8 is a sectional Figs. 6 and 7.) The sections a c are provided with any" suitable stops to limit their descent.

K is a roller containing a spiral spring, one end of which is connected to the roller, and the other end to a stationary arbor or box upon which the roller turns. No novelty is claimed in this construction of spring-roller,.the same being in common use for window-curtains. On the other hand I do not confine myself to said form of spring, as equivalent devices might be used-*for instance, a flat spring coiled in the manner of a clock spring, which would thus take the place of not only the spring-roller K, but also of the tapes L, shown coiled upon the roller and passing over plates or pads M to the rear edge of the lower coversection, a, to which they are connected by a hook, L, and eye L (See Figs. 2, 3, and 8.) I prefer to make the tapes L of spring-brass, but not to confine myself to this material.

N is a spring, of which there may be one at each end of the desk. (See dotted lines in Fig. 1.) The spring N has a forked head, 0, engaging the sector-shaped end of section 0, so as to push the section forward. The relative strength of the counterbalance spring or springs acting on the belts or tapes L and the springs N is such, taken in connection with the weight of the cover, that the cover will remain in any position in which it may be placed. Thus it may be drawn down or thrown up with the greatest case. Of course I do not strictly confine my claim to the device in what I consider its most perfect form, as just dethey reach their upper position, Fig. 3. Thus there is no uncertain movement or jar. \Vhen the section 0 reaches its upper position, Fig. 3, its rear edge impinges against cushion or cushions P, of rubber or other suitable material, to prevent jar. I prefer to make the spring that acts upon the belts L adjustable in force, so that it may be made to act as an equivalent to the weight of the cover and the spring N taken together, and thus act as an exact counterpoise, as before described.

I claim as new and of my invention 1. In a desk, the combination of the table, a top to the table, open at the front side, a twopart cover, one part sliding under the other, and a spring counter-balance connected to the part which rests on the table and to the back of the top, asset forth.

2. In a cylindcr-desk, the two-part cover 0 c, hinged to the main part, counterbalancespring secured to the lower section, and a spring to press forward the upper section, in

combination with a suitable top, as set forth.

3. In a cylinder-desk, the combination of the main part, the upper and lower sections hinged to the main part, the upper section, 0, having notched rear plate, G, and guide-rib H, the lower section hinged to the sides of the top 0, having notched rear plate, I, and a top having guide-rib d, the notched plates to slide on their respective ribs, as set forth.

4. In a cylinder-desk, the combination of a table, a top thereto, a springrroller secured to the back of the top, a cover in two sections hinged to the sides of the top, to slide one under the other and both under the top, and counterbalance-spring tapes L, secured to the rear of the lower section and to the roller, as set forth.

CHARLES H. TYLER.

lVitn esses: SAML. KNIGHT, TRUSTEN P. DYER. 

